pi()

Ina Schmitz

Hi all,

is there any possibility to use pi() (3.14...) like it is in SQL Server in a
query to a DB2 database? How is the syntax therefore?

Thanks for good ideas!
Cheers,
Ina

Nov 12 '05 #1

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Serge Rielau

Ina Schmitz wrote:

Hi all,

is there any possibility to use pi() (3.14...) like it is in SQL Server in a
query to a DB2 database? How is the syntax therefore?

Thanks for good ideas!
Cheers,
Ina

CREATE FUNCTION PI()
RETURNS DOUBLE
NO EXTERNAL ACTION CONTAINS SQL DETERMINISTIC
RETURN 3.14......;

Cheers
Serge

--
Serge Rielau
DB2 SQL Compiler Development
IBM Toronto Lab

Nov 12 '05 #2

Jan M. Nelken

Serge Rielau wrote:

Ina Schmitz wrote:
Hi all,

is there any possibility to use pi() (3.14...) like it is in SQL
Server in a query to a DB2 database? How is the syntax therefore?

Thanks for good ideas!
Cheers,
Ina

CREATE FUNCTION PI()
RETURNS DOUBLE
NO EXTERNAL ACTION CONTAINS SQL DETERMINISTIC
RETURN 3.14......;

Cheers
Serge

RETURN 22.0 /7.0 should yield better accuracy (within precision of REAL numbers)

Jan M. Nelken

Nov 12 '05 #3

mecej4

Jan M. Nelken wrote:

Serge Rielau wrote:
Ina Schmitz wrote:
Hi all,

is there any possibility to use pi() (3.14...) like it is in SQL
Server in a query to a DB2 database? How is the syntax therefore?

Thanks for good ideas!
Cheers,
Ina

CREATE FUNCTION PI()
RETURNS DOUBLE
NO EXTERNAL ACTION CONTAINS SQL DETERMINISTIC
RETURN 3.14......;

Cheers
Serge

RETURN 22.0 /7.0 should yield better accuracy (within precision of REAL
numbers)

Jan M. Nelken

No. The rational approximation 22/7 is good only to 3 decimal digits,
whereas floats can hold many more.

values asin(1)*2
or
values atan(1)*4

will provide full precision and are easy to remember.

N. Shamsundar
University of Houston

Nov 12 '05 #4

Serge Rielau

mecej4 wrote:

Jan M. Nelken wrote:
Serge Rielau wrote:
Ina Schmitz wrote:

Hi all,

is there any possibility to use pi() (3.14...) like it is in SQL
Server in a query to a DB2 database? How is the syntax therefore?

Thanks for good ideas!
Cheers,
Ina

CREATE FUNCTION PI()
RETURNS DOUBLE
NO EXTERNAL ACTION CONTAINS SQL DETERMINISTIC
RETURN 3.14......;

Cheers
Serge

RETURN 22.0 /7.0 should yield better accuracy (within precision of
REAL numbers)

Jan M. Nelken

No. The rational approximation 22/7 is good only to 3 decimal digits,
whereas floats can hold many more.

values asin(1)*2
or
values atan(1)*4

will provide full precision and are easy to remember.

N. Shamsundar
University of Houston

Well, can't say I didn't learn anything here.

--
Serge Rielau
DB2 SQL Compiler Development
IBM Toronto Lab

Nov 12 '05 #5

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